I agree with Chris. Some differences in the frame design might help you narrow it down some as well. Is the serial number sticker totally gone or erased?Need a better photo. And the casting date code is not the most accurate way to date these grills, but if the serial number sticker is unreadable then it's the best you can do....unless you get yourself one of those UV lights mentioned in your previous thread.
RespectfullyThanks BPratt